<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Containing block for absolute positioned elements is nearest positioned (relative) ancestor</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-04-04 -->
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#containing-block-details" />
        <link rel="match" href="containing-block-009-ref.xht" />

        <meta name="assert" content="If the element has 'position: absolute', the containing block is established by the nearest positioned ancestor." />
        <style type="text/css">
            #div1
            {
                border: solid black;
                margin: 50px;
                position: relative;
                top: 0;
            }
            div div
            {
                height: 1in;
                width: 1in;
            }
            #div2
            {
                margin: 50px;
            }
            #div3
            {
                background: blue;
                right: 0;
                position: absolute;
                top: 0;
            }
        </style>
    </head>
    <body>
        <p>Test passes if a filled blue square is in the <strong>upper-right corner</strong> of an hollow wide black rectangle.</p>
        <div id="div1">
            <div id="div2">
                <div id="div3"></div>
            </div>
        </div>
    </body>
</html>